One thing you can do to help you with the turn around for secondaries is to write a "why MD/PhD?" essay. Pretty much everyone asks this along with a "why our school?" and "what are your research interests?" essays. You can definitely write some generic ones that you modify for each school before hand. This will allow you to get those secondaries back ASAP.
As far as schools that were quick to offer interviews and acceptances, a few come to mind:
Pitt
Case
WashU
UVA
Michigan
Uproarhz made a good point that some schools will just shuffle you back for months and you'll end up getting interviews from them six months after your secondary was submitted. Similarly, post interview, some schools will offer a handful of immediate acceptances while the majority of applicants are put into the "wait and see" pile. Chances are if you do get acceptances early on, you'll get more in time. Also, some schools don't even start interviewing til fairly late in the process. For example, the UWash doesn't start interviewing until January. Anyway, there are a ton of schools that don't start handing out acceptances until after November, and there are many that are not rolling at all so don't worry so much about November - that's a ton of time to find a job - more then is probably needed.
Good luck.